I've gone through the rulebook and the FAQ and don't seem to be able to find a definitive answer to when the range between two ships an be checked. We have been playing previously that it can be checked at any point from any ship, but I'm not sure this is the case. On reading the rulebook again it appears that range isn't checked until an attack is declared (and a target).
However, it doesn't appear to be hugely clear, unless I'm missing something?
Edit: For clarity this is weapon firing ranges.
Edited by Grimmeth